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10699988i need help on these it's for my class. I'm in eighth grade

and take just science but we're doing this which is more chemissry like. Please I need lots of help thank you from the bottom of my heart.

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7. Which two subatomic particles
are located in the nucleus of an
atom?
1 . Droton
2. neutron
protons + neutrons
8. If an atom has 35 protons in the nucleus, how many electrons will it have orbiting the
nucleus?
35 electrons
9. What is the atomic number of the atom in the diagram above?
10. What is the atomic mass/mass number of the atom in the diagram above?
11. How many protons are in the nucleus of an atom with an atomic number of 15?
12. How many electrons are in the nucleus of an atom with an atomic number of 20?
13. How many neutrons are in the nucleus of an atom with an atomic number of 25?
(use Periodic Table for mass)
14. What is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons?
15. How many neutrons are in the nucleus of an atom that has an atomic mass of 36 and an
atomic number of 25?

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